Re: Imported Java lib can't find classes compiled on the fly

2013-03-17 Thread Víctor M . Valenzuela 
There's the alternative signature Class.forName(String, boolean,
ClassLoader). I got the Java side to use that instead of a plain
Class.forName, passing it a custom ClassLoader (see my immediately previous
reply).

On Sun, Mar 17, 2013 at 12:38 PM, Marko Topolnik
wrote:

> No built-in Java mechanism (such as Class/forName) relies on the context
> classloader, that's just a mechanism that was supposed to help other
> frameworks manage class loading. Every such framework would have to
> explicitly getContextClassLoader to use it.
>
>
> On Sunday, March 17, 2013 4:05:51 AM UTC+1, vemv wrote:
>
>> My guess is it was set via Thread.currentThread().**
>> setContextClassLoader()...?
>>
>> On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela wrote:
>>
>>> Yeah I was working in that direction now!
>>>
>>> Anyway, how come (Class/forName) can work if used from the repl? My
>>> understanding is that the classloader provided by Class is different from
>>> DynamicClassLoader.
>>>
>>>
>>> On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin 
>>> wrote:
>>>

 2013/3/17 vemv 

> I guess that somehow the Java library uses a different classloader or
> something like that? Any possible solution?


 Clojure itself uses a separate classloader: a 
 clojure.lang.**DynamicClassLoader
 instance.

 If you can use an instance of that classloader, you should be fine.
 --
 MK

 http://github.com/**michaelklishin 
 http://twitter.com/**michaelklishin 

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Re: Imported Java lib can't find classes compiled on the fly

2013-03-17 Thread Marko Topolnik 
No built-in Java mechanism (such as Class/forName) relies on the context 
classloader, that's just a mechanism that was supposed to help other 
frameworks manage class loading. Every such framework would have to 
explicitly getContextClassLoader to use it.

On Sunday, March 17, 2013 4:05:51 AM UTC+1, vemv wrote:
>
> My guess is it was set via 
> Thread.currentThread().setContextClassLoader()...?
>
> On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela 
> 
> > wrote:
>
>> Yeah I was working in that direction now!
>>
>> Anyway, how come (Class/forName) can work if used from the repl? My 
>> understanding is that the classloader provided by Class is different from 
>> DynamicClassLoader.
>>
>>
>> On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin 
>> 
>> > wrote:
>>
>>>
>>> 2013/3/17 vemv >
>>>
 I guess that somehow the Java library uses a different classloader or 
 something like that? Any possible solution?
>>>
>>>
>>> Clojure itself uses a separate classloader: a 
>>> clojure.lang.DynamicClassLoader instance.
>>>
>>> If you can use an instance of that classloader, you should be fine.
>>> -- 
>>> MK
>>>
>>> http://github.com/michaelklishin
>>> http://twitter.com/michaelklishin
>>>  
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>>
>>
>

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Re: Imported Java lib can't find classes compiled on the fly

2013-03-17 Thread dennis zhuang 
You can make the clojure class loader by yourself:

(import '(clojure.lang RT))
(def class-loader (RT/makeClassLoader))

user=> (.loadClass class-loader "user.Foo")
user.Foo



2013/3/17 vemv 

> Most definitely :) But that something is hard/confusing should'nt be
> enough reason to give up.
>
>
> On Sunday, March 17, 2013 4:11:34 AM UTC+1, James Xu wrote:
>
>> Then things will get complicated and ugly.
>>
>>   原始邮件
>> *发件人:* Víctor M. Valenzuela
>> *收件人:* clojure
>> *发送时间:* 2013年3月17日(周日) 11:05
>> *主题:* Re: Imported Java lib can't find classes compiled on the fly
>>
>> My guess is it was set via Thread.currentThread().**
>> setContextClassLoader()...?
>>
>> On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela wrote:
>>
>>> Yeah I was working in that direction now!
>>>
>>> Anyway, how come (Class/forName) can work if used from the repl? My
>>> understanding is that the classloader provided by Class is different from
>>> DynamicClassLoader.
>>>
>>>
>>> On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin 
>>> wrote:
>>>
>>>>
>>>> 2013/3/17 vemv 
>>>>
>>>> I guess that somehow the Java library uses a different classloader or
>>>>> something like that? Any possible solution?
>>>>
>>>>
>>>> Clojure itself uses a separate classloader: a 
>>>> clojure.lang.**DynamicClassLoader
>>>> instance.
>>>>
>>>> If you can use an instance of that classloader, you should be fine.
>>>> --
>>>> MK
>>>>
>>>> http://github.com/**michaelklishin <http://github.com/michaelklishin>
>>>> http://twitter.com/**michaelklishin <http://twitter.com/michaelklishin>
>>>>
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>>>
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Re: Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread vemv 
Most definitely :) But that something is hard/confusing should'nt be enough 
reason to give up.

On Sunday, March 17, 2013 4:11:34 AM UTC+1, James Xu wrote:
>
> Then things will get complicated and ugly.
>
>  原始邮件  
> *发件人:* Víctor M. Valenzuela>
> *收件人:* clojure>
> *发送时间:* 2013年3月17日(周日) 11:05
> *主题:* Re: Imported Java lib can't find classes compiled on the fly
>
> My guess is it was set via 
> Thread.currentThread().setContextClassLoader()...?
>
> On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela 
> 
> > wrote:
>
>> Yeah I was working in that direction now!
>>
>> Anyway, how come (Class/forName) can work if used from the repl? My 
>> understanding is that the classloader provided by Class is different from 
>> DynamicClassLoader.
>>
>>
>> On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin 
>> 
>> > wrote:
>>
>>>
>>> 2013/3/17 vemv >
>>>
>>>> I guess that somehow the Java library uses a different classloader or 
>>>> something like that? Any possible solution?
>>>
>>>
>>> Clojure itself uses a separate classloader: a 
>>> clojure.lang.DynamicClassLoader instance.
>>>
>>> If you can use an instance of that classloader, you should be fine.
>>> -- 
>>> MK
>>>
>>> http://github.com/michaelklishin
>>> http://twitter.com/michaelklishin
>>>  
>>> -- 
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Re: Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread xumingming64398966 
Then things will get complicated and ugly. 原始邮件 发件人: Víctor M. Valenzuela收件人: clojure发送时间: 2013年3月17日(周日) 11:05主题: Re: Imported Java lib can't find classes compiled on the flyMy guess is it was set via Thread.currentThread().setContextClassLoader()...?On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela  wrote:
Yeah I was working in that direction now!Anyway, how come (Class/forName) can work if used from the repl? My understanding is that the classloader provided by Class is different from DynamicClassLoader.

On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin  wrote:

2013/3/17 vemv 



I guess that somehow the Java library uses a different classloader or something like that? Any possible solution?Clojure itself uses a separate classloader: a clojure.lang.DynamicClassLoader instance.



If you can use an instance of that classloader, you should be fine.-- MKhttp://github.com/michaelklishin

http://twitter.com/michaelklishin






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Re: Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread Víctor M . Valenzuela 
My guess is it was set via
Thread.currentThread().setContextClassLoader()...?

On Sun, Mar 17, 2013 at 3:07 AM, Víctor M. Valenzuela  wrote:

> Yeah I was working in that direction now!
>
> Anyway, how come (Class/forName) can work if used from the repl? My
> understanding is that the classloader provided by Class is different from
> DynamicClassLoader.
>
>
> On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin <
> michael.s.klis...@gmail.com> wrote:
>
>>
>> 2013/3/17 vemv 
>>
>>> I guess that somehow the Java library uses a different classloader or
>>> something like that? Any possible solution?
>>
>>
>> Clojure itself uses a separate classloader: a
>> clojure.lang.DynamicClassLoader instance.
>>
>> If you can use an instance of that classloader, you should be fine.
>> --
>> MK
>>
>> http://github.com/michaelklishin
>> http://twitter.com/michaelklishin
>>
>> --
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Re: Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread Víctor M . Valenzuela 
Yeah I was working in that direction now!

Anyway, how come (Class/forName) can work if used from the repl? My
understanding is that the classloader provided by Class is different from
DynamicClassLoader.

On Sun, Mar 17, 2013 at 3:01 AM, Michael Klishin <
michael.s.klis...@gmail.com> wrote:

>
> 2013/3/17 vemv 
>
>> I guess that somehow the Java library uses a different classloader or
>> something like that? Any possible solution?
>
>
> Clojure itself uses a separate classloader: a
> clojure.lang.DynamicClassLoader instance.
>
> If you can use an instance of that classloader, you should be fine.
> --
> MK
>
> http://github.com/michaelklishin
> http://twitter.com/michaelklishin
>
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Re: Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread Michael Klishin 
2013/3/17 vemv 

> I guess that somehow the Java library uses a different classloader or
> something like that? Any possible solution?


Clojure itself uses a separate classloader: a
clojure.lang.DynamicClassLoader instance.

If you can use an instance of that classloader, you should be fine.
-- 
MK

http://github.com/michaelklishin
http://twitter.com/michaelklishin

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Imported Java lib can't find classes compiled on the fly

2013-03-16 Thread vemv 
Related with my immediately previous question (generate static methods at 
runtime),
 
but not the same.

There's a Java lib which I import and run from a Clojure repl. In that 
repl, if I perform e.g. (defrecord Foo []), then I can succesfully run 
(Class/forName 
"user.Foo").

But if then the Java code gets to execute Class.forName("user.Foo"); it 
will complain that it can't find the class.

I guess that somehow the Java library uses a different classloader or 
something like that? Any possible solution?

Thanks - Victor

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